Pump assembly



Sept-16, 1941- K. E. LUNDIN 2,255,851

' PUMP ASSEMBLY Filed Oct. 21, 1940 3 Sheets-Sheet 1 KWTE. A u/vw/v,

1 N VE N TOR.

' 77'ORNEX Sept. 16, 1941. K. E. LUNDIN PUMP ASSEMBLY Filed Oct. 21,1940 3 Sheets-Sheet 3 Kmart. lu/va/Al,

1N VENTOR.

Patented Sept. 16, 1941 PUMP ASSEMB Y Knut E. Lundin, Los Angeles,Calif., assignor to Radial Pump and Compressor Company, Los

Angeles, Calif.

Application October 21, 1340, Serial No. 362,089

3 Claims.

This invention relates to pumping devices and particularly to a pumpingassembly which is an improvement upon the pump structure for pumpingeither air or water or a combination of both, described in my co-pendingapplication, Serial No. 330,518, filed April 19, 1940.

By the present invention the meritorious features of the pistonstructure set forth in my said application are maintained and a moresturdy dependable means is provided for supporting the multiple pump andits operating means, so that the vibration resulting from the rotationof the driving shaft and parts gyrated thereby does not tend to cause aninjurious effect upon any part of the apparatus.

Stating more in detail the objects and advantages of the presentinvention, thereby an improved pair of castings is provided, the lowercasting of the pair being adapted to form the basal and underlyingsupport of the whole apparatus and at the same time serying as a supplymeans for the air and water, the upper casting serving as an outletmeans for the fluid pumped thereupinto from the lower reservoir; andimproved spacing and securingmeans being provided whereby saidreservoirs are maintained at a proper vertical space from each other,thus providing room between them for the pump struc-, ture, which issuperimposed upon the lower casting and is housed in a thoroughlyprotected manner between the two castings.

Still another object of the invention is to provide an improved pistoncylinder head structure for each of the piston cylinders and at the sametime utilize such structure as a part of an improved housing means forthe pumping structure. With the foregoing and other objects in view,

the invention resides in the novel arrangement 7 and combination ofparts and in the details of construction hereinafter described andclaimed, it being understood that changes in the precise embodiment ofthe invention herein disclosed may be made within the scope of thesubject matter claimed without departing from the spirit of theinvention.

Referring to the accompanying drawings, which illustrate what is atpresent deemed to be a preferred embodiment of the invention,

Fig. l is a side elevationof the-complete apparatus.

Fig. 2 is a transverse section thereof, the plane of section beingindicated by the line 22 on Fig. 1.

Fig. 3 is a vertical mid section of the complete apparatus except thatthe motor casing which surmounts the structure illustrated is shown inside elevation.

Fig. 4 is a stepped transverse section, the plane of section beingindicated by the angular line 4-4 on Fig. 3.

Fig. 5 is a perspective of one of the water piston cylinder heads, allof which are of the same design and serve as spacers between the upperand lower hollow castings. I

Fig. 6 is an end view of one of the water piston cylinder heads, shownin Fig. 5.

Referring in detail to the'drawings, the structure shown comprises as toits main parts enumerating them from below upwardly, a lower casting Hihaving foot portions II for resting upon a horizontal support, an uppercasting l2, a series of combined piston cylinder heads and spacers I3,|3w which serve to separate said castings vertically to a sufiicientextent to provide room between them for the pump structure M, a gearcase or gear housing l5 resting upon said upper casting l2 andcontaining gearing l6, and a motor housing ll which is supported by saidgear case I5.

Thelower casting I3 is of a six arm, stellate character and contains alower chamber 2|] and an upper chamber 2|, these chambers .being in thepresent embodiment respectively used for water and air, thewaterentering the chamber 23 through a supply pipe 22. Said chambers 2| and22 are separated by a partition wall 23, the air supply conduit 24 forthe chamber 2| being shown in Fig. 3.

The stellate character of the chambers 20 and 2| is well illustrated inFig. 2 where the lower chamber 20 is shown furnished with three radially extending arm portions 213a, 2017, and 200, and the upper chamber2| is shown furnished with radially extending arm portions 2|a, 2lb, and210, the arm portions of one chamber alternating symmetrically withthose of the other chamber;

The central portion of the lower casting is furnished on'its upper sidewith a flat circular rise 26 and upon this rise is superimposed thecentral portion of a pump housing frame 21 which includes a series ofsix pumping cylinders, three of which 3|, 32 and 33 are shown forpumping airand alternating other three 34, 35 and 36 for pumping water.Said cylinders occupy substantially the same horizontal plane and arecircumferentially arranged in relation to the center of the frame 21with their axes extending radially. The three water pumping cylindersand their pistons P and adjacent parts are shown as being of identicalconstruction and, therefore, are all letter-ed in the same manner.

The upper hollow casting I2 in the main is shaped similarly to the lowercasting I and contains an air reservoir 201' and a water reservoir 2Ir.Said casting engages the upper side of the frame 21 in a similar mannerto said casting I0, being furnished with a depressed wall portion 44which fits into a circular depression provided for it in the upper faceof the pump frame 21. Said frame is hexagonal and its open top andbottom, in the assembled structure, are closed respectively by the uppercasting I2 and the lower casting I0. V

The upper casting I2 has a flat top throughout its central part, and onthis flat part rests the aforesaid gear case I5, said gear case, inturn, supporting the motor casing II. ing- I2 has a tubular centralportion 45 within which is abearing sleeve 46 which receives a verticalshaft41, said shaft 41 is driven by the motor ,I'Im, the motor shaft 48operating the primary member49 of the reduction gearing I6,

the final member 50 of said gearing being secured to the power deliveryshaft 41 already mentioned. .The, reduction .gearing constructionineludes-a transmission-shaft! and a pinion 52, the latter pinion beingin mesh with aforesaid gear 50. The lower end of the shaft 41 carries acrank disk 53 which gyrates an eccentric pin 54 which in-turn gyrates apiston operating head 55 ,with which. the inner end of each of thepiston;rods,is pivotally connected, except the master rod 51, which issecured in a fixed relationjto said head, i

,Eachjwater, pumping piston cylinder and its related. parts, well shownin section in the righthand portionof Fig. 3, includes the pistoncylinder.35 havi ng fitted within it a piston head 38, toithe outer faceof which is attached a leather gasket33 having a flexible peripheral-lip40 which is directed away from the outer end of the piston. 'Within thecupped portion of the gasket is nested the rubber disk 39a which ismaintained in a compressed relation thereagainst to provide adeak proof.condition between said peripheral lip 4Iljandits cylinder wall by meansof the follower plate39 b and cap screw 39c,

1 Against the'outer ends of the piston cylinders 34, "35.and 36 abut, ina fluid tight manner the pistoncylinder heads I3w. Each of said headshas extending through it a vertical passage 4I withan expanded lowerinlet portion 4Ia and at its upperend an expanded outlet portion 4Ib,these expanded portions respectively containing the ball check ,valves,42 and 43. Above the ba 11,4 2 is a stop pin 42s and above the ball 43is astop pin 435.- The central portion of the passage 4! is kept incommunication with thepiston jiylindenbymeans of aspacious horizontalfunnel shapedpass age 4Ic which is located centrally of the head I310and which hasits large end directed toward the piston cylinder.

' gTh head I3 'w of each water" piston cylinder has a plug 58 screwinginto the outer end portion of thelpas'sageflcgthis'passage being ofsufficient size to afford access for anoperating tool intoandthrough"theheadl so that the workman need not detach 'the he'a'd toobtainaccess' to theiriterionthjereof in order to apply the tool tdithecapiscrewfific. All six' piston cylinder heads 'are shown held in'placeby cap screws 59. filt order: tomake room for'the heat radiating finsfortheair cylinders each arm of the lower The upper cast-,

directed mouth portions 25y;

casting Ill has its upper side in a downwardly spaced relation to saidfins, while the corresponding arm of the upper casting I2 likewise hasits lower side in an upwardly spaced relation to the subjacent fins.

The flanged mouth portions 20.1: of the lower six arms all lie in thesame horizontal plane which is on a level with the bottom faces of thepiston cylinder heads I3 and I3w. The similarly flanged mouth portions201 of the upper six arms are correspondingly arranged, being directeddownwardly to the level of the upper faces of the piston cylinder headsI3, I3w. Said upper mouth portions are identical in construction withthose shown in plan in Fig. 2.

The piston heads I3 for the piston cylinders 3|, 32 and 33 that containair, are constructed somewhat differently from those of my aforesaidpending application, containing an upwardly directed lower inlet passage60 which communicates with the adjacent piston cylinder through a valvesleeve BI that is screwed into a threaded collar 64 against whichoperates a compression spring 65 tending to hold the valve to its seat.The valve operates through a spider structu're'66 carried internally bythe sleeve 6|. Downwardly into the upper portion of the piston cylinderhead I3 leads an intake passage 61 which communicates with the inner endof a valve cage 68, having near its right hand end an internal valveseat for the head of the valve 69. The latter valve is provided with astem I0 which'slides within a socket II provided for it in the head I3.A spring 12 completes "this part of the structure and tends to hold thevalve 69 upon its said seat. 7 With the lower passage 60 communicatesone ofthe three arms of the lower air supply chainber, whereas with theupper passage 61 communicates one ofthe three arms of the upper airreservoir.

The aforementioned piston operatinghead,

said pin, and into this socket screws a screw 16,

the head of which engages a washer or disk 11' which engages the lowerend of said bearing to keep it in place.

The air reservoir of the upper casting I2 is furnished with an airdelivery outlet pipe I8, and the water reservoir of said upper castingis provided with a water delivery pipe 79.

Around the upper part of the lower casting Ill extends a hexagonalflange and a like flange 8I extends around the lower part of the uppercasting I2. Cap screws 82 extend through these flanges into the cornerportions of th'ehexa gonal frame 21 to secure together the parts I0, I2and I4. The piston cylinder heads-I3 and I3w. are provided at theirouter ends with upper flanges 83 which (except for an interveninggasket) abut against the flanges of the downwardly and lower flanges 84which, (except for an intervening gasket) abut against the flanges ofthe lower mouthp'or-' tions 201:. There are six upper and lower matedflanges, which are securely held together in each instance by an outerspanner bolt 85 and the side spanner bolts 86. When it is desired totighten the cap screw 390 it is necessary to remove the spanner bolt 85before access may be had to the plug 58.

The gear housing I is secured to the flat top wall of the upper castingl2 in any suitable manner, for example, by screws 81.

Upon the flat top of said gear housing is superimposed the motor housingthe latter housing having a peripheral basal flange 88 provided withsuitable apertures to receive screws 89 whereby the motor housing issecured to said gear housing.

It will aid in understanding the operation of the apparatus, to pointout the course the water follows through the passages shown in the righthand portion of Fig. 3 on its way from the water chamber 20 up to thewater reservoir 211*. 7

As the pin 54 of the crank disk 53 continues its gyratory movement fromthe position of Fig. 3 it, in turn, imparts a gyratory movement to thepiston operating head 55, thus causing the master rod 51 (which is inthis instance substituted for a piston rod like the rod 55 at theopposite side of the head 55) to start the piston head 38 on itsleftward travel. Thewater, which has previously entered chamber 20through supply pipe 22, is now entrained from said chamber upwardly pastvalve 42, through the passage 41 and Me into the piston cylinder 35.After the piston head completes its leftward movement and moves towardthe right, the water is ejected from the cylinder 35 through the passage4| and, passing upwardly from said passage past the valve 43 enters thesuperjacent arm of the stellate shaped water reservoir 2lr. During theoutward movement of the piston head 38 the compressed water in advancethereof will tend to additionally expand the gasket structure and causeits peripheral lip 40 to make a more liquid tight fit. Wear upon thegasket is thus compensated for.

While the water is thus being pumped upwardly through the right handportion of the structure shown in Fig. 3, the air, through an opposedcycle of operations, is being pumped upwardly in the left hand portionthereof, this air pumping operation being similar except for adifference in the passage which communicate with the piston cylinders 3iand in the valves mounted in said passages. From the air chamber 2| thair is entrained through the passage 60 and thence enters the left endof the sleeve 6! within which the valve 62 operates. The suction of theadjacent receding piston head will then entrain the air past the valve62 into the piston chamber 3i and the return movement of said pistonhead will expel the air past the upper valve 69, thence through thesleeve 58 and into the air reservoir 251' via the vertical passage 10.

From the foregoing description of portions of the operation, thesimultaneous functioning of the other four pistons and their relatedparts will readily be understood.

What is claimed is:

1. In a pumping assembly, a lower water chamber of a stellate character,the points or arms of said chamber extending in generally horizontaldirections, a lower air chamber overlying said water chamber, said airchamber being also of a stellate character and having its arms arrangedin alternation with the arms of said water chamber, a pump structuresuperimposed upon the structure of said chambers, said pump structurehaving piston cylinders provided with pistons radiating from a commoncenter, alternate piston cylinders being in valve controlledcommunication with the arms of said water chamber and the interveningpiston cylinders being in valve controlled communication with the armsof said air chamber, a stellate shaped water reservoir overlying saidpumping assembly and having its arms in communication with the pistoncylinders which pump water, a stellate shaped air reservoir overlyingsaid water reservoir and having its arms arranged in alternation withthe arms of said water reservoir and in communication with the pumpcylinders which pump air, and a driving shaft operatively connected withthe inner ends of said pistons.

2. The subject matter of claim 1 and, said driving shaft extendingdownwardly through said upper reservoirs and terminating above saidlower air chamber.

3. In a pumping assembly, a lower casting having foot portions to restupon a horizontal support, said casting having upper and lower wallportions with a space between them and a transversely extendingpartition between said wall portions dividing said space into an upperand a lower chamber for air and water, a pump structure superimposedupon said lower casting, said pump structure having a plurality ofpiston cylinders containing pistons radiating centrally therefrom, theouter ends of said cylinders having heads, valve controlled passageswithin said heads, an upper casting superjacent to said pump structure,said upper casting having within it reservoirs to receive air and waterdelivered from said valve controlled passages, said cylinder headsserving as spacing members between said castings to maintain themsufliciently separated vertically to provide room for said pumpstructure, and securing means for said cylinder heads to aid inmaintaining the entire structure in a properly assembled relation, saidvalve controlled passages communicating with said piston cylinders tocomplete a pumping means for forcing air and water upwardly from thechambers of said lower casting to the reservoirs of said upper casting.

KNUT E. LUNDIN.

